Forum Discussion
CirrusVLAN ID and tag
CirrusSo, when we configure vlan, we could have two choices, one is tagged and other is untagged interface. For example, the tag is 10, then we put it under untagged interface 1.1, the tag 10 means vlan10 will be created, but why we have choice to put it under untagged interface? That would remove tag 10? or if so, what that means after removing tag10? Thank you
CirrostratusBasically, strictly within the networking concept itself, you can have trunk interfaces (tagged ports) and access ports (untagged ports).
When you specify a tag of X, vlan X is created. What dictates further the choice of tagged vs untagged is the device and configuration at the other end of the link.
So you could then have two cases:
a) The port is tagged - meaning, it is a trunk port. Furthermore, it accepts incoming tagged frames and tags frames before sending them out. You setup a trunk port if your F5 connects to another trunk port - normally on another switch. In this configuration you are basically aggregating traffic from all vlans, on a single port.
b) The ports is untagged - in this case, you are configuring an access port in vlan X - simple as that. You could have more than one port in the same VLAN - think of it as a switch with more than one port in the same vlan ... so hosts connected to those two ports can communicate directly as they will be in the same broadcast domain. Unlike with trunk ports, here you are segregating the traffic into multiple vlans.
